from django.conf import settings
from django.core.mail import send_mail
from celery_tasks.email.tasks import send_verify_url
from rest_framework import serializers
from .models import Address

from .models import User
from django_redis import get_redis_connection


class RegisterUserSerializer(serializers.ModelSerializer):
    password2 = serializers.CharField(min_length=8, max_length=20, label='确认密码', write_only=True)
    sms_code = serializers.CharField(min_length=6, max_length=6, label='短信验证码', write_only=True)
    allow = serializers.CharField(label='协议', write_only=True)
    token = serializers.CharField(label='jwt口令', read_only=True)

    class Meta:
        model = User
        fields = ('id', 'username', 'password', 'password2', 'mobile', 'sms_code', 'allow', 'token')
        read_only_fields = ('id',)
        extra_kwargs = {
            'password': {
                'min_length': 8,
                'max_length': 20,
                'write_only': True
            }
        }

    # 单字段校验
    def validate_allow(self, value):
        if value != 'true':
            raise serializers.ValidationError('必须同意协议')
        return value

    # 多字段校验

    def validate(self, attrs):
        # 取出手机号
        mobile = attrs['mobile']
        sms_code = attrs['sms_code']

        # 校验密码
        if attrs['password'] != attrs['password2']:
            raise serializers.ValidationError('两次密码不匹配')
        # 校验短信验证码
        redis_conn = get_redis_connection("code")
        redis_sms_code = redis_conn.get('sms_code_%s' % mobile)
        if not redis_sms_code:
            raise serializers.ValidationError('短信验证码已过期')
        if sms_code != redis_sms_code.decode():
            raise serializers.ValidationError('短信验证码填写错误')

        return attrs

    # 重写create
    def create(self, validated_data):
        del validated_data['password2']
        del validated_data['sms_code']
        del validated_data['allow']

        # 创建对象
        user = super(RegisterUserSerializer, self).create(validated_data)
        # 设置jwt
        from rest_framework_jwt.settings import api_settings
        jwt_payload_handler = api_settings.JWT_PAYLOAD_HANDLER
        jwt_encode_handler = api_settings.JWT_ENCODE_HANDLER
        payload = jwt_payload_handler(user)
        token = jwt_encode_handler(payload)
        user.token = token
        # 密码加密
        user.set_password(validated_data['password'])
        user.save()

        return user


class UserInfoSerializer(serializers.ModelSerializer):
    class Meta:
        model = User
        fields = ('id', 'username', 'mobile', 'email', 'email_active')


class EmailSendSerializer(serializers.Serializer):
    email = serializers.EmailField(label='邮箱')

    def update(self, instance, validated_data):
        # 将邮箱设置到用户对象
        email = validated_data['email']
        instance.email = email
        instance.save()

        # 发送邮件
        verify_url = instance.generate_verify_url()

        # send_mail(subject='来自MDmall的邮箱验证激活', message=verify_url, from_email=settings.EMAIL_FROM, recipient_list=[email])
        send_verify_url.delay(verify_url, email)
        return validated_data


class AddressSerializer(serializers.ModelSerializer):
    province = serializers.StringRelatedField(read_only=True)
    city = serializers.StringRelatedField(read_only=True)
    district = serializers.StringRelatedField(read_only=True)

    province_id = serializers.IntegerField(label='省id')
    city_id = serializers.IntegerField(label='市id')
    district_id = serializers.IntegerField(label='区id')

    class Meta:
        model = Address
        exclude = ('user', 'is_deleted', 'create_time', 'update_time')

    def create(self, validated_data):
        validated_data['user'] = self.context['request'].user

        return super(AddressSerializer, self).create(validated_data)


class AddressTitleSerializer(serializers.ModelSerializer):
    class Meta:
        model = Address
        fields = ('title',)



